Breaking Down Adaptive Radiation Therapy: A Call to Action

Adaptive Radiation Therapy (ART) has been a concept in radiation oncology for nearly three decades, yet its widespread implementation remains limited. The foundation of ART can be traced back to a pivotal paper published 28 years ago by Di Yan and colleagues at William Beaumont Hospital in Michigan. Their study demonstrated the potential of using multiple CT scans to refine treatment planning for individual patients. Despite the clear benefits of this approach, ART is still not routinely available in a fast, automated, and cost-effective manner. This underscores the urgent need to expand access to this transformative technology.

The Complexity of Adaptive Radiation Therapy

The ART workflow can be defined in three key steps:

1. See - In radiation therapy, this involves acquiring daily patient images.
2. Think - Clinicians analyze these images to determine if an adaptation is necessary.
3. Act - Treatment plans are either continued or modified based on real-time assessments.

There are three primary timescales in ART:

1. Offline ART - Adjustments made between treatments.
2. Online ART - Adjustments made before a treatment session begins.
3. Real-time ART - Adjustments occurring dynamically during treatment.

Each approach involves multiple decision points, such as evaluating treatment contours, clinical objectives, and quality assurance benchmarks. The complexity of ART means that while it holds great promise, its integration into clinical workflows remains a challenge.

The Global State of ART Adoption

A recent ESTRO study surveyed 177 institutions across 40 countries, revealing that while 61% of centers perform ART, only 6% conduct online daily replanning. Furthermore, 80% of institutions have access to ART tools, but only 3% of patients in Australia, for example, receive adaptive treatments. This gap highlights the pressing need for streamlined, scalable solutions.

Barriers to ART Implementation

Three major barriers to widespread ART adoption were identified:

1. Human Resources - The specialized expertise required is often in short supply.
2. Technical Limitations - The complexity of integrating ART into clinical workflows.
3. Equipment and Financial Constraints - The high costs associated with ART technologies.

To overcome these barriers, ART solutions must be automated, accurate, and cost-effective. Current workflows introduce additional resource strain, making it clear that existing models are not globally scalable.

Moving Forward

The need for ART is undeniable. With growing access to advanced tools, the priority now is making ART efficient, accessible, and sustainable for all patients. By focusing on offline ART as the first step, we can bridge the gap and ensure more patients benefit from personalized, adaptive treatment plans. This is a call to action for the industry to innovate and scale ART solutions that can transform cancer care on a global level.

To learn more about expanding global access to offline adaptive radiotherapy, watch the on-demand webinar with Prof. Paul Keall, Chief Scientific Officer at SeeTreat, as he discusses this important topic.